CN1012548B - Apparatus and method for obtaining frequency agility in digital communication system - Google Patents

Apparatus and method for obtaining frequency agility in digital communication system

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Publication number
CN1012548B
CN1012548B CN 88107850 CN88107850A CN1012548B CN 1012548 B CN1012548 B CN 1012548B CN 88107850 CN88107850 CN 88107850 CN 88107850 A CN88107850 A CN 88107850A CN 1012548 B CN1012548 B CN 1012548B
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user
channel
plurality
station
frequency
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CN 88107850
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Chinese (zh)
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CN1042812A (en )
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杜安·里奇利·波尔金诺
丘郎·迪格狄莱特
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国际运动机公司
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Abstract

一个通讯系统,包括多个与基地电台进行RF通信的用户台,该基地电台有多个顺序地重复的时隙,每一时隙分配给一特定的用户台;以及转换频率或时隙的装置,用于克服由于调制变化,频率通道干扰,设备故障等,或由于其他用户台进入线路所引起的传输畸变。 A communication system, comprising a plurality of user stations and the base station RF communication, the base station sequentially repeated a plurality of time slots, each time slot assigned to a particular subscriber station; and means for converting the frequency or time slots, to overcome the variation of the modulation, the frequency of co-channel interference, equipment failure, or because another user station transmission distortion caused by entering the line.

Description

本发明涉及无线数字电话系统,其中,基地电台经RF信道和与其联接的多个用户台进行通信,其方式是经过一指定信道同时与多个用户台通信,该信道具有多个顺序地重复时隙,且特定时隙指定于特定用户台。 When the present invention relates to wireless digital telephone system, wherein the base station communicate via a plurality of subscriber stations RF channels and coupled thereto in a manner that a user station communicating via a designated channel simultaneously with a plurality of the channels having a repeating plurality of sequentially gap, and the particular time slot assigned to a particular user station.

本发明所涉及的无线数字电话系统包括一个经RF信道与多个与其联接的用户台进行通信的基地台,其通信方式是经过一指定信道同时与用户台进行通信,该信道具有多个顺序地重复时隙,且特定时隙被指定给特定用户台。 Wireless digital telephone system according to the present invention comprises one of the base stations communicating via the RF channel and the plurality of coupled thereto subscriber station, which communication method is to simultaneously communicate with a subscriber station through a designated channel, the channel having a plurality of sequentially repeated slot, and a particular time slot is assigned to a specific user station. 在其他用户单元摘机进入的情况下,或由于调制变化,频道干扰、设备故障或类似事件导致发送质量降低时,本发明所提供的装置能自动改变频率或时隙组态,或两项均作改变。 In the case of the other hook into the subscriber unit, or due to changes in the modulation, channel interference, equipment failure or similar events result in reduced transmission quality, the present invention provides means to automatically change the frequency or time slot configuration, or both are be changed. 该转换装置包括一个远程接续处理装置和一个交换装置,最好是以集中器的形式实现,该交换装置包括一个开关,它通过将通信电路中的所选端口物理地连接于一个所选时隙,使开关能够响应来自远程连接处理装置的控制信号。 The conversion processing means comprising a remote connection means and a switching means, preferably in the form of realization of the concentrator, the switch means comprises a switch, by which the communication circuit is selected port physically connected to a selected time slot , the switch can be responsive to control signals from the remote apparatus connection processing. 根据远程连接处理装置所接收的状态信息来提供控制信号。 Providing a control signal in accordance with the state of the remote connection information processing apparatus is received.

本发明涉及无线数字电话类型的通信系统,尤其涉及到系统中的这种装置,它可以自动调整该系统,以补偿工作期间出现的不良影响,例如频率干扰、衰落、链路质量劣化和设备故障等。 The present invention relates to digital wireless telephone type of communication system, particularly to such a device into the system, which can automatically adjust the system to adverse effects occurring during the compensation operation, for example, frequency interference, fading, equipment failures and degradation of the quality of the link Wait.

本发明可应用于1985年3月20日提交的美国专利申请流水号713,925上公开的系统,其颁布的专利号是4,675,863,颁布日期为1987年6月23日。 The present invention can be applied to a system disclosed in U.S. Patent Application Serial No. 713,925 on March 20, 1985 filed which is issued patent No. 4,675,863, date of enactment of June 23, 1987. 这种系统包括一个基地台和由RF信道连接于基地台的多个用户台。 Such a system comprises a base station and a plurality of subscriber stations connected to the base station by the RF channel. 它提供了用户台之间及以具有多个端口的外部通讯网路的通信。 It is provided between the user station and the external communications network having a plurality of communication ports. 该基地电台包括一个通信电路,用于使多个端口及用户台之间经过一指定的通信信道同时进行通信;该信道具有多个顺序地重复时隙,而预定时隙分别被指定给预定用户台。 The base station includes a communication circuit, for causing the designated communication through a channel for communication between a plurality of ports simultaneously and a user station; the channel having a plurality of sequentially repeated slots, and the predetermined time slots are assigned to the predetermined user station. 该系统包括一个电话总局终端(COT),其中装有远程接续无线电处理装置(RPU),用于使指定给一个特定用户台的时隙和特定信道之间进行通信;它还装有一交换装置,用于将通信电路与端口进行连接。 The system includes a central office terminal (the COT), wherein the radio connection with the remote processing means (an RPU), for communication between subscriber stations assigned to a particular time slot and a specific channel; further provided with a switching means, a communication circuit connected to the port. 所述交换装置最好是下文将要详述的那类集中器,它包括一个开关,该开关响应从RPU发出的控制信号,使一个所选端口物理地连接于指定给特定用户台的所选通信信道时隙。 The switching means is preferably will be hereinafter described in detail the kind concentrator, which includes a switch that in response to a control signal from an RPU, so that a selected one of the selected communication port physically connected to the station assigned to a specific user channel timeslot.

通信电路包括多个信道控制装置(CCUs),这些装置根据RPU经基带控制信道(BCC)传递给CCU的命令信号,将指定的通信信道时隙与相应的用户台耦合。 The communication circuit comprises a plurality of channel control means (CCUs), these means transmitting command signals to the CCU via the baseband channel according to the RPU (BCC), the specified communication channel slot is coupled with the respective user station. 这些命令信号是根据状态信息经BCC提供给RPU的,以指示出通信信道时隙及用户台的使用状态。 These command signals are based on the state information provided by the BCC to the RPU to indicate the use state of the communication channel time slot and the subscriber station. 所指定的通信信道时隙由一个位于指定射频(RF)信道中的特定时隙耦合于相应的用户台。 The designated communication channel at the specified time slot of a radio frequency (RF) channel of a particular time slot coupled to a respective subscriber station. BCC是经分别连接于RPU的线路提供给每个CCU的。 BCC is connected to the RPU by a line provided to each of the CCU. 控制命令及状态信息经指定给预定RF信道的预定时隙的无线电控制信道(RCC)在CCU和用户台之间传递。 Control command and status information transmitted between the CCU and the subscriber station to a predetermined time slot designated for a predetermined RF channel radio control channel (RCC).

本发明的主要目的是提供频率及时隙的快变,以克服基地台和与其有关的用户单元之间在传输时的任何困难。 The main object of the present invention to provide a fast frequency and time slot change, to overcome any difficulties between the base station and the subscriber unit associated therewith during transmission. 本发明的另一个目的是以相当简单并便宜的方式提供上述快变功能。 Another object of the present invention is relatively simple and inexpensive manner to provide the above-described function becomes faster.

本发明的各种其它目的及其优点将根据下面的附图作详尽的描述,其中:图1是本发明所用基地台的方框图,所连接的用户台也作出指示。 Various other objects and advantages of the invention will be from the following detailed description of the accompanying drawings, wherein: FIG. 1 is a block diagram of the base station used according to the present invention, the subscriber station is also connected to an indication.

图2是实施本发明的单用户单元的方框图。 FIG 2 is a block diagram of a single subscriber unit of the present invention.

图3是实施本发明的双用户单元的方框图。 FIG 3 is a block diagram of the subscriber unit bis embodiment of the present invention.

图4是实施本发明的多个单用户单元的方框图。 FIG 4 is a block diagram of the plurality of subscriber units according to the present invention.

图5是实施本发明的多个双用户单元的方框图。 FIG 5 is a block diagram of a plurality of dual subscriber units according to the present invention.

图6是实施本发明的无线电处理装置矩阵。 FIG 6 is a matrix radio processing apparatus of the present embodiment of the invention.

图7是本发明所用信道模块较详细的方框图。 FIG 7 is a channel block more detailed block diagram of the present invention is used.

图8是实施本发明的无线电处理装置及其连接元件的方框图。 FIG 8 is a radio processing apparatus and the block diagram embodiment of the present invention connected elements.

图9的方框图功能性地表示了基地台与一个用户台之间的通信层。 Figure 9 a block diagram functionally showing the communication layer between the base station and the subscriber station.

图中:BBC 基带控制通道BER 误码率CCT 信道控制任务 FIG: BBC control channel baseband BER bit error rate channel control task CCT

CCU 信道控制装置CO 电话总局COT 电话总局终端CRC 循环冗余校验DBM 数据库模块LQ 链路质量MF 故障MPM 信息处理模块MTU 主定时装置MUX 多路调制器PCM 脉冲编码译码调制RCC 无线电控制信道RF 无线电频率RPU 无线电处理装置RRT 远程无线电终端SCT 用户控制任务SDLC 同步数据链路控制SM 调度模块VCU 话音信号编码装置XMIT 发送机REC 接收机参照附图,其中相同的部分标有相同的参照符号,图1所示为一个基地台,用10标志,它包括一个标号为12的电话总局终端(COT),一个标号为14的远程无线电终端(RRT)。 CCU channel control device of the central office CO telephone central office terminal COT CRC Cyclic Redundancy Check module DBM database link quality LQ MF fault information processing module MPM unit MTU master timing multiplexer MUX PCM Pulse Code Modulation coded radio control channel RCC RF radio frequency processing means RRT RPU radio remote control radio terminal SCT user SDLC synchronous data link control task scheduling module SM VCU speech signal coding apparatus REC receiver transmitter XMIT with reference to the accompanying drawings, in which like parts are designated by the same reference numerals, FIG. 1 is shown a base station, a flag 10, which includes a telephone central office terminal (COT) 12, a designated, a designated remote radio terminal 14 (RRT). COT12包括一个无线电处理装置(RPU)16,它通过接口18耦合到交换装置20。 COT12 includes a radio processing unit (RPU) 16, which is coupled to the switching device 18 through an interface 20. 该交换装置最好是集中器式的,例如采用带有一个转换开关的“Model 1218C”数字映象集中器,它可由美国纽约州纽约市的ITT公司提供。 The switching means is preferably a concentrator type, for example using the switch with a "Model 1218C" digital image concentrator, which may be the city of New York, NY ITT companies.

交换器20通过多个双外线24与电话总局(CO)22连接,并经回声消除器26和多个跨距中继线28连接到多个多路调制器(MUX)30上,这些调制器耦合于远程无线电终端14中的主定时装置(MTU)32。 A plurality of dual-exchanger 20 outside the central office 24 is connected to the (CO) 22, and by the echo canceller 26 and by a plurality of spans to a plurality of trunks 28 is connected a multiplexer (MUX) 30, which is coupled to a modulator remote radio terminal 14 in the master timing unit (MTU) 32. 每条跨距中继线28载有多个由各自的多路调制器MUX30调制的时隙。 Each span trunk 28 contains a respective plurality of multiplexer MUX30 modulation slots. 基带控制信道(BCC)34提供MUX30和信道模块36之间的通信,它占有跨距中继线28中一条中继线的一个时隙。 The baseband control channel (BCC) 34 provides MUX30 and a channel for communication between the module 36, which occupies a slot 28 spans a trunk of trunk.

每一制成标准组件板的(MUX)30可处理24个脉冲编码调制(PCM)同时电路,或23个PCM同时电路加BCC。 Each plate is made of standard components (MUX) 30 can handle 24 Pulse Code Modulation (PCM) circuit while, simultaneously, or PCM circuit 23 plus BCC. MUX从中继线28获取数据,并将其分配给信道模块36,模块36通过功率放大器40与收发网络38连接。 MUX 28 to obtain data from the trunk, and assigned to the channel module 36, the module 40 through the power amplifier 36 is connected with the transceiver network 38.

RPU 16对交换器(集中器)20和RRT14具有基本控制,并处理用户要求,以便在用户台42和电话总局(CO)22之间建立所需通路。 RPU 16 to the switching device (concentrator) 20 and RRT14 basic control, to process a user request to establish the required passage 22 between the subscriber station 42 and the telephone central office (CO).

每一用户台42可以具有一个单用户单元,一个双用户单元,或一个多用户单元。 Each user station 42 may have a single subscriber unit, one pair of a subscriber unit, or a multiple dwelling unit. 图2所示的单用户单元包括一个耦合于天线52和调制解调器54之间的无线电收发两用机50,而调制解调器54又与为用户台58接收或发送的信号进行编码或译码的编码译码器56连接。 Shown in FIG single user unit includes a transceiver coupled between the antenna 52 and the modem 5450, and a modem 54 encodes and decodes encoding or decoding received or transmitted signal to a user station 58 56 is connected. 在图3中,除了上述相同普通型单元外,它还包括一个双用户单元,其中天线60,无线电收发机62,调制解调器64和编码译码器66通过缓冲器68和70与分开的用户台72和74连接。 In FIG. 3, in addition to the same general type unit further includes a dual subscriber unit, wherein an antenna 60, transceiver 62, modem 64 and the codec 66 through the buffer 68 and 70 separate from subscriber station 72 and 74 are connected.

在图3的双用户单元中,如果在一个时隙中发送并接收两个会话,则无线电收发机,调制解调器和编码译码器可以是只能一次执行一台话机操作的单可逆部件,即经每条线发送或接收。 In dual subscriber unit of FIG. 3, if the two transmitted and received in a session slot, the radio transceiver, a modem and codec may be executed only a single member reversing operation once the telephone, i.e., by each line transmission or reception. 更进一步,由于该单元永远不会同时接收并发送,因而不需要双工器,因为重复只通过缓冲器68和70发生,这些缓冲器连接于用户台的接口电路(图中未示出)。 Still further, since the cell never receives the transmitted simultaneously and therefore does not require the duplexer because only repeated by buffers 68 and 70 occurs, the buffer is connected to a user station interface circuit (not shown).

图4所示为单用户的复接系统,它包括汇接、展开和双工网络80,耦合于天线82和多个单用户单元84a,84b,84n。 Figure 4 is a single-user multiplexing system comprising a tandem, expand and duplex network 80, is coupled to an antenna 82 and a plurality of subscriber units 84a, 84b, 84n. 每一用户单元耦接于一各自的用户台86a,86b和86n。 Each subscriber unit is coupled to a respective user stations 86a, 86b and 86n.

图5除了具有与图4相同的复接系统外,网络88耦接于双用户单元90,92,94等等,其类型如图3所示,每一单元耦接于分别的双用户台,例如,96和98接单元90,100和102接单元92,而104和106接单元94。 In addition to FIG. 5 has the same multiplexing system of Figure 4, network 88 is coupled to a subscriber unit 90, 92 bis, etc., of the type shown in FIG., Each cell coupled to the respective user station bis 3, For example, units 96 and 98 connected to means 92 and 102, 90, 100, 104 and 106 while bonding units 94.

在会话期间,由于下述因素可能产生一些问题:(a)多用户分配,(b)调制变化,(c)干扰和(d)各个信道的设备故障。 During the session, because of the following factors may cause problems: (a) Multi-user allocation, (b) modulating changes, equipment failure (c) interference and (d) of the respective channels.

图6展示了一个RPU矩阵的例子,其中各用户以字母A至G表示,水平行表示频率,而垂直列代表时隙。 Figure 6 shows an example of a RPU matrix, wherein each of the user with the letters A to G represents a horizontal line represents frequency, and the vertical columns represent time slots. 数字“1”表示“在使用”而“0”表示“未使用”。 Numeral "1" indicates "in use" and "0" indicates "unused." 在该矩阵中,由于接收时隙总是偏离2个时隙,所以只有发送时隙需要存储。 In the matrix, since the reception slot is always offset from two slots, so only need to store a transmission slot.

在操作时,经常发生特定频率的所有4个时隙由不同用户占用的情况。 Of all four time slots during operation, often a specific frequency occupied by different users. 假设例如有一个双用户单元而其他是单用户单元。 Suppose, for example, have a dual subscriber unit while the others are single-user unit. 在双用户单元情况下,有必要使双用户占用相邻的时隙。 In the case of dual-user unit, it is necessary to occupy adjacent time slots bis user. 若两个双用户之一占用了一个特定的频率和时隙而该频率的其他时隙由其他单用户所占用,且若两个双用户的另一个需要连接(因为他已经摘机进行呼叫或者呼叫已从电话总局进入他的线路);则该频率的相邻时隙中的任一个单用户必须转移到另一个频率和/或时隙,用以为两个双用户的第二方提供机会,或者第一个双用户占用的特定频率和时隙必须移到相邻时隙可用的另一频率上去。 If one of the two pairs of users occupy a specific frequency and time slot and other time slots of the frequency occupied by other single-user, and the other two pairs when the user needs to be connected (since he has picked up the call or a call from the central office into his line); the frequency of any single adjacent time slots in a user must move to another frequency and / or time slots, with a second party that provides the opportunity to two pairs of users, or the first double time slot and a specific frequency to be occupied by the user to another frequency slots available to move up adjacent. 在这种情况下,RPU动作以建立现行连接并将它们保存在其存储器中,因此,可以确定矩阵中的哪一个发送机可起作用。 In this case, an RPU operation to establish the existing connection and store them in its memory, and therefore, a transmitter can determine which matrix can act.

以上类型的发送机以下述方式实现:例如假设双用户的第一方当时以频率D在发送时隙1(接收时隙3)中进行会话连接,当双用户的第二方摘机时,一个告警信号(一位)送回到基地台作为除会话以外发送的控制位的一部分,告警位在信道模块36中被检测,然后由信道模块36将一信息通过MUX30,跨距中继线28,交换器20和接口18沿反向会话通路或一分离通路回送到RPU16。 The above type transmitter implemented in the following manner: For example, assume a first party when the user double-frequency transmission slots D 1 (reception time slot 3) connect to a session, when the user double-hook a second party, a alarm signal (a) is returned to the base station as a control bit to be transmitted in addition to part of the session, the alarm bits in a channel module 36 is detected, then the channel information through a module 36 of multiplexer 30. the, the span trunks 28, switch 20 and an interface passage 18 or a session in the reverse path back to the separation RPU16. 反之,电话总局(CO)22送来的信号经由交换器20和接口18到RPU16。 Conversely, telephone central office (CO) 22 via a signal sent switch 20 and the interface 18 to the RPU16.

一旦出现例如摘机信号或来自电话总局的信号,必须为双用户的第二方选用一个时隙以便将其连到双用户第一方已经使用时隙的相邻时隙中的基地台。 Once, for example, off-hook signal or signals from the central office, the second party must choose a user double-slot in order to connect it to the base station side has a first user using dual slot adjacent slots. 当可能将第一双用户从频率D移动到G时,由于同一频率的两个空余相邻时隙并非总是可用的,所以转移并非最佳。 When the mobile user may double the first frequency from D to G, since two adjacent vacant time slots at the same frequency is not always available, so the transfer is not optimal. 在任何情况下,至少容易将相邻单用户单元从频率D,时隙2转移到一个不同频率。 In any case, at least adjacent single subscriber unit is easily transferred from the D frequency, time slot 2 to a different frequency. 在所示例子中,可将相邻用户转移到八个开放时隙中的任何一个之中,由于被转移的单用户无需相邻时隙来发送和接收,若只在频率中转移(如从信道D到B或G),则可在时隙不用时完成,因此不会出现问题,若在时隙和频率中进行转换,则发送数据的一个时隙宽度将被重复或失去。 In the illustrated example, the user may be transferred to any adjacent open slot among the eight, since the single-user does not need to be transferred to adjacent time slots to send and receive, if only transferred in frequency (e.g., from channel D to G or B), can not be completed in time slots, so no problem, if the conversion in frequency and time slot, a time width of the transmission data will be lost or repeated.

类似情况在复接单用户单元中也存在,如图4。 A similar situation exists in the multiplexing unit in a single-user, as shown in FIG 4. 由于每个单元有一组完整的单元,所以一次可以发送一个单元以上。 Since each cell has a complete set of units, it can send more than one unit. 事实上,最好同时发送和同时接收,以防止接收机前端过载。 In fact, simultaneous transmission and simultaneous reception is best to avoid overloading the receiver front end. 因此,在图6矩阵中,若两个用户占用了频率B和D上的时隙1,且建立的呼叫要求第三个用户,则RPU16必须把频率F或G上的时隙1指定给第三用户。 Thus, in the matrix of FIG. 6, if a user occupies two time slots on frequencies B and D 1, and establishes a third call requires user, it must RPU16 timeslots on a frequency assigned to the F or G 1 of three users.

在图5的系统且为复接双用户单元的情况下,每对双用户的第一用户必须在不同频率的同样时隙中,而每对双用户的第二用户必须在各自用户的同一频率的相邻时隙中。 In the case of multiplexing and dual subscriber unit in the system of FIG. 5, each of the first user-bis user must at the same frequency in different time slots, and each second user the user must double the frequency of the same in the respective user adjacent time slots.

在上述条件下,RPU在每一时间间隔处导致当前连接,并在其存贮器中将其存储起来,因此,可在任意时刻确定矩阵中可受影响的传输。 Under the above conditions, resulting in an RPU in each time interval of the current connection, and stores it in the memory which, therefore, can determine the matrix of transmission can be influenced at any time.

在所有上述条件中,所述及的是多用户情况下的时隙和频率的分配,而变化的因素是发生在基地电台之外的(来自电话总局或用户台)。 In all of the above conditions, and that the time slot and frequency allocation in multi-user situation, while varying factors occurring outside the base station (or subscriber stations from the central office). 在下述由于衰落或干扰导致的调制变化,或由于设备故障带来变化的情况下,检测来自基地台本身变化因素。 In the following due to the absence of interference or fading caused by changes in the modulation or variation caused due to equipment failure is detected by changes in factors from the base station.

在基地台中,如图7所示,每一信道模块36包括一个信道控制装置(CCU)110以及一个调制解调器112,它们分别通过各自的压缩数据链路116和控制状态链路118与话音信号编码译码装置(VCU)114相连。 In the base station shown in Figure 7, each channel module 36 comprises a channel control unit (CCU) 110 and a modem 112, link 118 which are translated by the speech signal encoding the respective compressed data link 116 and control status code means (VCU) 114 is connected. VCU由脉冲码调制(PCM)数据通道120连至MUX30,而CCU通过同步数据链路控制(SDLC)122连到MUX30。 VCU by a pulse code modulation (PCM) data channel 120 connected to MUX30, the CCU by Synchronous Data Link Control (SDLC) 122 connected to MUX30.

多个缓冲器(未示出)与各个部件相关联,就这一点而言,每一信道模块含有一个用于每个时隙的AGC缓冲器,以及一个测量接收到的脉冲误差的差别的链路质量(LQ)缓冲器。 A plurality of buffers (not shown) associated with the various components, in this regard, each channel AGC module comprises a buffer for each slot, and a difference between measured error pulses received chain Road quality (LQ) buffer. 另外,VCU还配有一个位误差率(BER)缓冲器,循环冗余校验(CRC)将作为每次会话的编码脉冲群的一部分发送,从而为BER缓冲器提供了BER计数。 Further, the VCU also has a bit error rate (BER) buffer, a cyclic redundancy check (CRC) sent as part of the encoding pulse bursts per session, thereby providing a count of the BER BER buffer.

为了这一目的,高AGC电平意味着正在接收高电平信号而接收机增益较小,反之,低电平AGC信号表明接收机增益较大且接收到了一个低电平信号,该AGC信号电平用于指出信号是否由于其衰落而产生了畸变,或是否有干扰存在,较高的AGC电平指出干扰,这是由于AGC电平取决于发送信号与任何干扰信号之和。 For this purpose, a high level AGC means while the receiver is receiving a high signal gain is small, on the contrary, the low level signal indicates that the receiver AGC gain is large and a low level signal is received, the AGC signal is used to indicate whether a signal level due to fading distortion is generated, or whether interference is present, the AGC level higher interference noted, this is due to the AGC level depends on the transmission signal and any interfering signals and sum. 在两种例子中,可由调制变化来进行修正。 In both examples, the modulations may be corrected. 在这一方面,正如以下将更清楚的讨论的,每个信道模块36含有一个调制解调器,它可由16相或4相调制传输和接收话音间隙。 In this regard, as will become more apparent in the following discussion, each channel module 36 contains a modem, it may be 16 or 4-phase modulation transmitting and receiving voice gaps. 在4相调制中每个符号通过的位数只有在16相调制中通过的1/2,但位率是一致的。 In the 4 bits per symbol phase modulation by the phase modulator 16 only by 1/2, but the bit rate is the same. 因此,当采用4相调制时,如图6中的矩阵所示的两个相邻时隙结合成一个延长的时隙,它所包含的位数与16相操作期间的情况相同。 Thus, when using four-phase modulation, as shown in FIG. 6 matrix into a combined two adjacent time slots elongated slot, where the same number of bits and it contains 16 during the operation phase.

例如,当一个双用户系统工作时,如果BER超过某一阀值(如0.1%)或LQ低于某一阀值(如6度),则相应缓冲器中的内容通过MUX-干线-交换器(集中器)-接口链路向RPU报告。 For example, when one pair of work the user system, if the BER exceeds a certain threshold (e.g., 0.1%) LQ or below a certain threshold (e.g. 6 degrees), the contents of the corresponding buffer by MUX- Route - exchanger (concentrators) - interface link to report RPU. RPU因此通过同一连接将一控制信号返送到控制模块,从而将16相切换为4相操作。 Therefore, by connecting the same RPU a control signal sent back to the control module, so that the switch 16 is 4-phase operation phase. 与此同时,若两个用户在同一频率的相邻时隙上同时工作,其中一个用户将以上述方式被切换到另一频率。 Meanwhile, if two users working simultaneously on the same frequency in adjacent time slots, wherein a user in the above manner is switched to another frequency.

若在调制电平已以上述方式改变后,AGC电平仍高于一个特定用户,则推测BER和LQ变劣的原因是干扰而非传输衰落。 If the above-described manner has changed modulation level, the AGC level is still higher than a specific user, the BER estimation and causes deterioration LQ is not interfering transmission fading. 所有AGC缓冲器的输出都向RPU报告,由其确定是哪一频率(若有的话)有一低AGC电平,然后,由RPU将该用户的频率从高AGC电平为改变为低AGC电平。 AGC output buffers are all reported to the RPU, the frequency of which is determined by (if any) has a low AGC level, then, the RPU by a user from high frequency AGC level is changed to the low AGC circuit level. 这一动作消除了可能存在的干扰。 This action eliminates interference may exist.

基地台还有故障(MF)缓冲器,它提供基地台链路中的每个链路的工作状态,该基地台链包括电话交换器(集中器),跨距中继线,MUX,信道模块,功率放大器,发送机和接收机,若MF缓冲器探测出故障或设备事故,将有一信号被送至RPU,指出所涉及的频率,一旦接收到该MF信号,RPU就对受影响的信道上同时发生的每一会话(如果存在的话)进行频率(若必要,亦可是时隙)切换。 There are base station fault (MF) buffer, which provides the operating state of each link in the link base station, the base station includes a telephone switch chain (concentrator), span trunk, the MUX, channel modules, power amplifiers, transmitters and receivers, MF, if the buffer device detects a problem or an accident, a signal is sent to an RPU, it indicated frequencies involved, upon receiving the MF signal, an RPU on the affected channels simultaneously each session (if present) frequency (if necessary, also a slot) switching.

RPU18是控制频率通道和时隙分配的主要元件,且其通用结构如图8所示。 RPU18 frequency control channel is the main element and a slot assignment, and the general structure shown in Fig. 它包括一个信息处理模块(MPM)130,它与数据库模块(DBM)132和调度模块(SM)134相连。 It includes an information processing module (MPM) 130, which is connected to the database module (DBM) 132 and a scheduling module (SM) 134. MPM管理RPU以及信道控制装置(CCU)110中的SM和DBM之间的所有接口以及位于RPU外的用户控制任务(SCT)136。 All interfaces between SM 110 and DBM MPM RPU management and channel control means (CCU) located outside the control task and the user's RPU (SCT) 136. CCU位于信道模块36之内,如图7所示,而SCT则与用户台相连。 CCU is located within the channel 36 of the module, as shown in Figure 7, and is connected to the SCT user station.

在操作时,如果(例如在呼叫时)链路质量(LQ)下降低于一频率电平,则RPU将信息传送到SCT136,它因此而与MPM130通信。 In operation, if (for example, when a call) a link quality (LQ) level falls below a frequency, transmit information to the RPU SCT136, which thus communicate with MPM130. MPM然后(a)送一信号到DBM132,以识别一可用信道,(b)由负责安排控制及定时的调度模块134进行检验(该调度模块用于安排由其顺序接收的信息)。 MPM then (a) send a signal to DBM132, to identify an available channel, (b) inspection (scheduling module for arranging the information received by the order) is responsible for arranging the timing of the control and scheduling module 134. 若有一信道可用,则MPM将一消息送回SCT,以便重新形成矩阵使该呼叫传到该可用信道上。 If a channel is available, then a message will be sent back to the SCT MPM, so as to form a matrix for the call re-transmitted to the available channels. 若无可用信道,则在原信道中保留该呼叫。 If no available channel, the call is retained in the original channel.

若在呼叫过程中所有四个时隙均被占用,但由于一个特定频率干扰,必须移动所有用户到具有同样各自时隙的另一频率时,将按下列顺序进行:当RPU由低质量的链路驱动时,它将送消息至SCT请求变换频率,该SCT将该消息发送到位于用户台处的信道控制任务(CCT)以便进行频率变换处理,并在一个分配可用CCU信道的基地电台处与MPM通信。 If all four slots are occupied during the call, but because of interference at a specific frequency, all users must be moved to another frequency having the same respective time slot, according to the following order: when a low quality link RPU when road driving, it will send a message to the SCT request frequency transformation, the SCT sends the message to the located in the user station at a channel control task (CCT) for a frequency conversion process, and an allocation of available CCU channel station at the base and MPM communication. 该MPM送一信号至DBM以识别一个可用信道,并由调度模块进行校验以在时间表中得到一个时间位置。 The MPM sends a signal to the DBM to identify one available channel, by the scheduling module to obtain a position of the check time in the schedule. 若有一可用信道,则MPM将一信息送回到SCT以重新形成该信道位置。 If a channel is available, a message is sent back to the MPM SCT to re-form the channel location. 若没有可用信道,SCT送一“忙”信号到RPU,并无变化发生。 If there is no available channel, SCT send a "busy" signal to the RPU, no change occurs.

图9示出了RCC方案,RPU16与CCU110和调制解调器112通信。 FIG 9 shows a communication scheme RCC, RPU16 CCU110 and the modem 112. 在用户台处,SCT136与配有调制解调器140的CCT138通信,RCC协议包括两层,一个数据链路层142和一个分组层144,数据链路层是部件之间的物理链路,而分组层包括在该物理链路上通过的信息,数据链路层负责误差检测,字同步和成帧,检测和消除冲突(在同样RF信道上的同一时隙的矛盾竟争。)参见图9,作为例子,RPU处理两个通路的协议:在第一个协议中,RPU将消息送到基地台的CCU请求改变调制,在第二个协议中,RPU将一个信息送至SCT请求改变频率,在第三个协议中,SCT将信息返回到RPU以指明所有信道频率均被占用。 At the user station, SCT136 with CCT138 communication with, the RCC modem 140 comprises two layers of protocol, a data link layer 142 and a layer 144 packet, the data link layer is a physical link between the members, and the packet layer comprises information through the physical link, the data link layer is responsible for error detection and framing synchronization word, detecting and eliminating conflicts (conflicts competitive same slot of the same RF channel.) Referring to Figure 9, as an example , an RPU protocol processing two paths: in the first protocol, the message sent to an RPU in the base station CCU request to change the modulation in the second protocol, an RPU a frequency change request information to the SCT, in the third a protocol, SCT returns information to the RPU to indicate all frequency channels are occupied.

在另一例子中,RPU将一信息协议送到SCT以请求信道频率转换,该信息有两个功能:首先,它请求用户台处的SCT获取一条从RCC到另一频率的路由。 In another example, an RPU information protocol to the SCT to a request channel frequency converter, this information has two functions: First, it requests the subscriber station at SCT obtain a route from the RCC to another frequency. 该SCT因此与CCT通信,CCT然后对信道进行搜索,并在出现一可用时隙和频率时进行交换,在其第二功能中,信息协议使SCT呼叫电话总局准备连接。 The SCT therefore communicate with CCT, CCT and then the channel search, and in the event of exchanging an available time slot and frequency, in its second function, the protocol information to make a call SCT ready to connect telephone central office.

如果在会话期间的链路质量低于预定电平,则RPU发出信息到CCU并请求转换调制电平。 During the session if the link quality is below a predetermined level, the message sent to the CCU and RPU requests the conversion modulation level. CCU通过MUX确认该信息经由SDLC链路到达RPU。 CCU through the MUX arrival acknowledgment information via RPU SDLC link.

Claims (9)

  1. 1.一个通讯系统,它包括多个与基地电台进行RF通信的用户台,所述基地电台有多个顺序的重复时隙和多个频率通道,所述时隙和频率通道有选择地分配给所述用户台,其特征在于所述系统还包括:响应一个控制命令信号、将选定的RF信道中的选定通信时隙耦合到相应的用户台的耦合装置,所述命令信号响应于表明与所述用户台有关时隙使用状态的状态信息;以及,用于响应另一用户的进入或在基地台与用户台通讯时的传输劣变而有选择地为任一用户台分配时隙和频率通道的分配装置。 1. A communication system comprising a plurality of user stations and the base station RF communications, the base station has a plurality of slots and a plurality of sequential repetition frequency channels, said time slot and frequency channel allocated to selectively said user station, wherein said system further comprises: in response to a control command signal, the selected time slot at a selected RF communication channel coupled to a corresponding coupling means of the user station, in response to the command signal indicates that status information about the subscriber stations slots used state; and, for another user to enter a response or transmission deterioration when the base station and the subscriber station communicate are selectively assigned to any user station and time slots dispensing means frequency channel.
  2. 2.根据权利要求1所述系统,其中所述的控制命令信号和状态信息通过一个无线电控制通道传送给所述用户台,该通道是选定RF信道的选定时隙。 2. The system of claim 1, the control command signal and wherein the status information via a radio control channel transmitted to the subscriber stations, the channel is selected RF channel selected time slot.
  3. 3.根据权利要求1所述系统,其中所述的控制命令和状态信息通过一个与电话总局和基地电台进行通信的无线电处理装置发送给所述用户台。 The system as claimed in claim 1, wherein the radio processing apparatus according to a control command and status information is communicated via a telephone central office and the base station and sent to the user station.
  4. 4.根据权利要求1所述的系统,其中所述的分配装置根据调制变化,频率通道干扰或设备故障引起的发送劣变而进行分配。 4. The system of claim 1, wherein said dispensing means being allocated according to the transmission deterioration modulations, frequency channels, or interference caused by equipment failure.
  5. 5.根据权利要求1所述系统,其中,有多个单用户台与所述分配装置进行通信。 5. The system of claim 1, wherein a plurality of single-user stations in communication with the dispensing device.
  6. 6.根据权利要求1所述系统,其中,有多个双用户台与所述分配装置通信,每对双用户台的每个用户可由所述分配装置分别分配给一选定频率通道中的相邻时隙。 6. The system of claim 1, wherein a plurality of dual subscriber stations communicating with the dispensing means, each subscriber station for each user may be double the dispensing device respectively assigned to a selected frequency channel phase o slots.
  7. 7.在具有一个与电话总局及通过RF信道与多个用户台通信的基地电台的通信系统中,该基地电台有多个顺序地重复的时隙及多个频率通道,将时隙和频率通道分配给选定用户的方法是:根据在一个存储矩阵中被占用时隙毗邻的情况在选定的频率通道中给所述的用户分配选定的空余时隙,所述分配响应于其他用户进入或基地电台与用户间的传送畸变引起的变化。 7. In the central office and having a RF channel by a plurality of users and the base station of a communication system of a communication station, the base station sequentially repeated a plurality of time slots and a plurality of frequency channels, time slots and frequency channels assigned to the user selected method is: according to the occupancy in the selected time slot adjacent to a frequency channel assigned to the user selected a vacant slot in the memory matrix, in response to entering the distribution to other users changes due to transfer or distortion between the base station and the user.
  8. 8.根据权利要求7所述方法,其中,传送畸变是由调制变化,频率通道干扰或设备故障引起的。 8. A method according to claim 7, wherein the distortion is transmitted by a change of the modulation, a frequency channel or interference caused by equipment failure.
  9. 9.根据权利要求7所述方法,其中,所述分配发生在会话过程中的两用户之间。 9. The method according to claim 7, wherein the dispensing occurs during the session between the two users.
CN 88107850 1988-11-14 1988-11-14 Apparatus and method for obtaining frequency agility in digital communication system CN1012548B (en)

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